/*
 * This file is part of aion-engine <aion-engine.com>
 *
 * aion-engine is private software: you can redistribute it and or modify
 * it under the terms of the GNU Lesser Public License as published by
 * the Private Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * aion-engine is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Lesser Public License for more details.
 *
 * You should have received a copy of the GNU Lesser Public License
 * along with aion-engine.  If not, see <http://www.gnu.org/licenses/>.
 */
package com.aionengine.gameserver.skillengine.effect;

import com.aionengine.gameserver.controllers.observer.ActionObserver;
import com.aionengine.gameserver.controllers.observer.ObserverType;
import com.aionengine.gameserver.model.gameobjects.Creature;
import com.aionengine.gameserver.model.gameobjects.Npc;
import com.aionengine.gameserver.skillengine.model.Effect;

import javax.xml.bind.annotation.XmlAccessType;
import javax.xml.bind.annotation.XmlAccessorType;
import javax.xml.bind.annotation.XmlAttribute;
import javax.xml.bind.annotation.XmlType;

/**
 * @author Sippolo
 */
@XmlAccessorType(XmlAccessType.FIELD)
@XmlType(name = "ChangeHateOnAttackedEffect")
public class ChangeHateOnAttackedEffect extends EffectTemplate {

    @XmlAttribute
    protected int value1;//delta
    @XmlAttribute
    protected int value2;

    @Override
    public void applyEffect(Effect effect) {
        effect.addToEffectedController();
    }

    @Override
    public void startEffect(final Effect effect) {
        super.startEffect(effect);

        // TODO: maybe this isn't correct formula?
        final int finalValue = value1 + value2;

        ActionObserver observer = new ActionObserver(ObserverType.ATTACKED) {

            @Override
            public void attacked(Creature creature) {
                if (creature instanceof Npc)
                    ((Npc) creature).getAggroList().addHate(effect.getEffected(), finalValue);
            }
        };

        effect.getEffected().getObserveController().addObserver(observer);
        effect.setActionObserver(observer, position);
    }

    @Override
    public void endEffect(Effect effect) {
        super.endEffect(effect);
        ActionObserver observer = effect.getActionObserver(position);
        if (observer != null)
            effect.getEffected().getObserveController().removeObserver(observer);
    }
}
